EDM graphite electrode advantages 1, fast speed;Graphite discharge is 2-3 times faster than copper, the material is not easy to deformation, in the processing of thin rib electrode has obvious advantages, the softening point of copper is about 1000 degrees, easy to deformation due to heat, the sublimation temperature of graphite is about 3650 degrees, by contrast, the thermal expansion coefficient of graphite material is only 1/30 of copper;Light weight; 3.The density of graphite is only 1/5 of copper, large electrode discharge machining, can effectively reduce the burden of the machine tool (EDM), more suitable for large mold application;Small loss; 4.Because the spark oil contains C atoms, during the discharge processing, high temperature causes the C atoms in the spark oil to be decomposed, and the protective film is formed on the surface of the graphite electrode to compensate for the loss of the graphite electrode.